(Beginner) How do i achieve these results?
This is due to the resolution of your normal map. You can improve the result by creating a bevel in your low poly mesh, and by merging your maps to optimize your texture space.
This will give give you a smooth effect.

You can achieve a hard border effect without bevel, and with both hard edges and separated UVs.

Also, you can increase the dilation width to avoid some pixelated border effects.